Are 61x/62T/63M Yamaha Pistons Interchangeable?

[jpswift1]

I found a GREAT deal on some new old stock Wiseco pistons (83mm) for my 735cc 62T/61X that I'm going to be building for my SN Superjet. They're for a 63M triple and the part number is 1 digit off compared to those specifically for the 62T and 61X engines. 791M08........vs. 790M08.......

Since the triple is pretty much the same as the twin with just an extra cylinder, do you guys think these will work or no? Thank you.

 

[MTRHEAD]

Yes - no issue.

 

[jpswift1]

Thanks for the reply. The Pro-X pistons are all the same part number for the 63m triples, and 62T and 61X twins, but Wiseco wasn't the same part number. I ended up calling Wiseco and they were very helpful and explained to me the only difference is that there's a tiny boost hole drilled in the 63M pistons (that's why their part number is different).